.c {
	margin: 1px;
	width: 19px;
	height: 19px;
	background: red;
	position: absolute;    //下落方块样式
}

.d {
	margin: 1px;
	width: 19px;
	height: 19px;
	background: gray;
	position: absolute; //下落到不能下落方块样式 其实就改变了颜色
}

.f {
	top: 0px;
	left: 0px;
	background: black;
	position: absolute; //整个游戏显示界面
}

.e {
	top: 0px;
	background: #151515;
	position: absolute;   //预告方块界面
}

.g {
	width: 100px;
	height: 20px;
	color: white;
	position: absolute;  //分数显示界面
}